A wall or jetty built out from a riverbank or seashore to control erosion (6)

I believe the answer is:

groyne

(Other definitions for groyne that I've seen before include "Beach breakwater" , "A bulwark" , "barrier method?" , "Protective wall extending into water" , "Structure built to control coastal erosion" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.